Demographics & People — Buffalo, Illinois
Population Overview
| Population (Census) | 405 |
|---|
| Estimated 2026 | ~700 |
|---|
| Median Age | 45.9 |
|---|
| Total Households | 171 |
|---|
| Family Households | 111 |
|---|
| Average Household Size | 2.37 |
|---|
| Diversity Index | 0.0433 (relatively homogeneous) |
|---|
Race & Ethnicity
| White | 355 |
|---|
| Black or African American | 0 |
|---|
| Asian | 2 |
|---|
| Hispanic or Latino | 6 |
|---|
Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 109 |
| German | 98 |
| English | 92 |
| Other groups | 69 |
| Irish | 63 |
| American | 35 |
| Norwegian | 26 |
| French (except Basque) | 15 |
| Hispanic: Mexican | 8 |
| Hispanic: Hispanic or Latino | 8 |
Language
| English Only | 388 |
|---|
| Spanish | 6 |
|---|
| Population 5+ | 398 |
|---|
Veterans
| Veterans | 31 |
|---|
| Population 18+ | 312 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Buffalo, Illinois.
